Videos
International Baccalaureate · IB Diploma · Physics · HL
Pick a topic to watch.
23 video lessons
4:00
Kinematics
A speedometer gives a reading at one moment. A journey average can hide stops and rapid changes in speed.
3:56
Forces and momentum
A passenger continues moving when a vehicle brakes. The seat belt provides the force needed to change th…
3:49
Work, energy and power
A motor can transfer some input energy to lifting and the rest to heating. Useful output is part of the …
4:04
Rigid body mechanics
A door is easier to open when pushed near its outer edge. Force size alone does not determine the turnin…
4:09
Galilean and special relativity
Two observers can assign different times between the same events. A clock reading has meaning only when …
4:10
Thermal energy transfers
Two equal masses receive the same energy but show different temperature rises. Material properties deter…
4:10
Greenhouse effect
One cold day does not disprove a warming climate. Weather describes short-term conditions; climate descr…
4:18
Gas laws
A sealed gas container changes pressure when heated. Celsius ratios cannot predict the pressure change b…
4:02
Thermodynamics
Compressing a gas can warm it even without a heater. Work is another path for energy transfer into the system.
3:44
Current and circuits
A lamp becomes dimmer when another is added in series. Current 电流 and energy transfer depend on the whol…
4:16
Simple harmonic motion
A swing gains a large amplitude when pushes arrive with the right timing. The forcing frequency and damp…
3:58
Wave model
A wave can carry energy across water while a floating marker mainly oscillates. Energy transfer and bulk…
8:06
Doppler effect
A recognizable spectral line appears at a longer wavelength in a distant source. Its shift can provide e…
3:51
Gravitational fields
An orbiting satellite is continuously falling while moving sideways. Being in orbit does not require gra…
4:18
Electric and magnetic fields
A negatively charged particle experiences an electric force opposite to the field direction. Field direc…
5:00
Motion in electromagnetic fields
A charged particle curves in a uniform magnetic field. Its direction changes although the magnetic force…
4:09
Induction
A magnet beside a wire does not always produce a current. An induced electromotive force depends on chan…
4:15
Structure of the atom
An excited gas produces separate coloured lines rather than every wavelength. The pattern is evidence fo…
4:17
Quantum physics
Bright low-frequency light can fail to eject electrons while dim higher-frequency light succeeds. Photon…
3:40
Radioactive decay
A detector records counts even when the classroom source is removed. Background must be considered befor…
4:37
Fission
A neutron can trigger a heavy nucleus to split, releasing energy and further neutrons. Whether the proce…
3:41
Fusion and stars
Two stars can have the same apparent brightness while having different luminosities. Distance changes th…
4:06
Experimental programme
A line passing near every data point is useful, but its gradient can still be uncertain. A graph is evid…